This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

简单电路求推荐芯片



手里有一个电压为9V的干电池,

手里还有2个电路板,输入电压分别为12V和4V

想用该电池给2个电路板供电,求推荐芯片

2个电路板电流都很小的,不会超过100mA